2166253769 has 8 divisors (see below), whose sum is σ = 2193219840. Its totient is φ = 2139308496.

The previous prime is 2166253759. The next prime is 2166253787. The reversal of 2166253769 is 9673526612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166253769 - 2²⁸ = 1897818313 is a prime.

It is a super-2 number, since 2×2166253769² = 9385310783413410722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166253759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366167 + ... + 372035.

It is an arithmetic number, because the mean of its divisors is an integer number (274152480).

Almost surely, 2^2166253769 is an apocalyptic number.

It is an amenable number.

2166253769 is a deficient number, since it is larger than the sum of its proper divisors (26966071).

2166253769 is an equidigital number, since it uses as much as digits as its factorization.

2166253769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10399.

The product of its digits is 816480, while the sum is 47.

The square root of 2166253769 is about 46543.0313688311. The cubic root of 2166253769 is about 1293.9071431671.

The spelling of 2166253769 in words is "two billion, one hundred sixty-six million, two hundred fifty-three thousand, seven hundred sixty-nine".